Fred,
I use the DCR-250 on my S5 IS a lot and have found that it gives a shallow field of focus. I have read many post on this and found several recommendations to get the DCR-150 also. It has less magnification but a deeper field of focus they say. If it doubles that may be 2mm instead of 1mm or 4mm in stead of 2mm. Most of my shots on insects and not so tiny subjects could use the deeper field of focus. I tried stacking images but have not been pleased with the results from all the work. I just got a DCR-150 today to give a try. My DCR-250 still has it's place though, see my "Dew Drops" post.
Also try a little "PP" to sharpen things up a touch. I have come to use Picnik.com quite a bit to make up for my deficiencies. I haven't had any formal "PP" training and never could get much done using Photoshop type softwares. Picnik comes so much easier to me. You can do a lot for free but my wife gets me the premium subscription as a gift each year as she sees how much pleasure I get from it.
For the image above I would use the "auto-fix" then a little "exposure" adjustment followed by a small amount of "sharpen". Then my secret is to go to "Create" "Effects" "HDR-ish" and almost totally fade out the effect 95+%. Then go to "Advanced" and "Levels" and just slightly shift to the right to get:

I think the "Levels" is the only premium option used. Give it a try, you might get hooked like me.
Hope this helps!
Joe
Canon R5, 7D Mk II, EF 100-400L MkII, EF 1.4X III, EF-S 18-135mm STM, 430 EX II flash, DCR-150, DCR-250, MANFROTTO 055XPROB w/ 322RC Grip